diff --git a/lib/tfw/components/webide_event_handler.py b/lib/tfw/components/webide_event_handler.py
index d3992b4..30c3e98 100644
--- a/lib/tfw/components/webide_event_handler.py
+++ b/lib/tfw/components/webide_event_handler.py
@@ -65,9 +65,7 @@ class FileManager:  # pylint: disable=too-many-instance-attributes
     @property
     def files(self):
         return [self._relpath(file) for file in glob(join(self._workdir, '**/*'), recursive=True)
-                if isfile(file)
-                    and self._is_whitelisted(file)
-                    and not any(fnmatchcase(file, blacklisted) for blacklisted in self.exclude)]
+                if isfile(file) and self._is_whitelisted(file) and not self._is_blacklisted(file)]
 
     @property
     def file_contents(self):
@@ -82,6 +80,9 @@ class FileManager:  # pylint: disable=too-many-instance-attributes
     def _is_whitelisted(self, file):
         return any(realpath(file).startswith(allowed_dir) for allowed_dir in self.allowed_directories)
 
+    def _is_blacklisted(self, file):
+        return any(fnmatchcase(file, blacklisted) for blacklisted in self.exclude)
+
     def _filepath(self, filename):
         return join(self._workdir, filename)